Please find attached a patch fixing that issue. Cheers,
diff -Nru brasero-3.4.1/debian/changelog brasero-3.4.1/debian/changelog
--- brasero-3.4.1/debian/changelog 2012-10-11 23:31:17.000000000 +0200
+++ brasero-3.4.1/debian/changelog 2013-03-13 21:32:39.000000000 +0100
@@ -1,3 +1,11 @@
+brasero (3.4.1-4.1) unstable; urgency=low
+
+ * Non-maintainer upload enabling choosing another location for DVD/CD-ROM
+ image via the properties dialog when home directory is full but another
+ disk has enough free space to hold the image. (Closes: bug#699819)
+
+ -- Abou Al Montacir <abou.almonta...@sfr.fr> Wed, 13 Mar 2013 20:00:00 +0100
+
brasero (3.4.1-4) unstable; urgency=low
* debian/patches/01_grafted_folders.patch: Fix a segfault when creating
diff -Nru brasero-3.4.1/debian/patches/enable_properties_button_when_volume_is_full.patch brasero-3.4.1/debian/patches/enable_properties_button_when_volume_is_full.patch
--- brasero-3.4.1/debian/patches/enable_properties_button_when_volume_is_full.patch 1970-01-01 01:00:00.000000000 +0100
+++ brasero-3.4.1/debian/patches/enable_properties_button_when_volume_is_full.patch 2013-03-11 21:43:02.000000000 +0100
@@ -0,0 +1,33 @@
+This patch enables choosing an other location for DVD/CD-ROM image via the
+properties dialog when home directory is full but an other disk has enough free
+space to hold the image. (Closes: bug#699819)
+
+--- brasero-3.4.1/libbrasero-burn/brasero-burn-options.c 2012-01-31 12:21:41.000000000 +0100
++++ brasero-3.4.1.patched/libbrasero-burn/brasero-burn-options.c 2013-03-10 21:50:35.000000000 +0100
+@@ -439,11 +439,14 @@
+ self);
+ }
+ else
++ {
+ brasero_notify_message_add (priv->message_output,
+ _("Please choose another CD or DVD or insert a new one."),
+ _("The data size is too large for the disc even with the overburn option."),
+ -1,
+ BRASERO_NOTIFY_CONTEXT_SIZE);
++ gtk_widget_set_sensitive (priv->properties, 1);
++ }
+ }
+ else if (valid == BRASERO_SESSION_NO_OUTPUT) {
+ brasero_notify_message_add (priv->message_output,
+--- brasero-3.4.1/libbrasero-burn/brasero-session-cfg.c 2012-01-31 12:21:41.000000000 +0100
++++ brasero-3.4.1.patched/libbrasero-burn/brasero-session-cfg.c 2013-03-11 21:33:25.000000000 +0100
+@@ -1064,6 +1064,9 @@
+ g_free (priv->output);
+ priv->output = NULL;
+ }
++ brasero_burn_session_get_output (BRASERO_BURN_SESSION (self),
++ &priv->output,
++ NULL);
+
+ if (priv->output_format)
+ priv->output_format = BRASERO_IMAGE_FORMAT_NONE;
diff -Nru brasero-3.4.1/debian/patches/series brasero-3.4.1/debian/patches/series
--- brasero-3.4.1/debian/patches/series 2012-10-11 23:26:11.000000000 +0200
+++ brasero-3.4.1/debian/patches/series 2013-03-08 15:41:29.000000000 +0100
@@ -2,3 +2,4 @@
02_fix-while-loop-in-libburnia-backend.patch
03_cue-invalid-frame-75.patch
04_put-settings-in-the-correct-path.patch
+enable_properties_button_when_volume_is_full.patch
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